Q. Under green revolution, which of the following high yielding variety crop introduced for the first time?

[A] Wheat

[B] Rice

[C] Maize

[D] Pigeon pea

Answer: A
Notes:

Explanation: It is the introduction of new techniques of agriculture, which became popular by the name of Green Revolution (GR) in early 1960s— at first for wheat and by the next decade for rice, too.

It revolutionized the very traditional idea of food production by giving a boost by more than 250 per cent to the productivity level.

Source: TMH Ramesh Singh